Returns an <code>RGB</code> representing the receiver.
@return the RGB for the color
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>
See Implementation
Returns an <code>RGB</code> representing the receiver.
@return the RGB for the color
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>